Safety-valve for steam-engines and the like.



V ROUX. SAFETY VALVE FOR STEAM ENGINES AND THE LIKE.

APPLIOATION FILED JULY 20, 1908.

Patented Apr. 6, 1909.

5 2 sums-sum 1'.

H. ROUX.

I SAFETY VALVE FOR STEAM ENGINES AND THE LIKE.

Patented Apr. 6, 1909.

2 SHEETS-SHEET K.

APPLIOATION FILED JULY 20, 1908,

rnvrir earns ra rnivr airmen HENRI ROUX, OF MARSEILLE, FRANCE.

SAFETY-VALVE FOR STEAM-ENGINES AND THE LIKE.

T 0 all whom it may concern:

Be it known that I, HENRI Roux, a citizen of the French Republic, andresident of 13 Rue Albrand, Marseille, France, engineer, have inventedcertain new and useful Immovements in and Relating to Safety- Valves forSteam-Engines and the Like, of which the following is a specification,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to an improved safety-valve for steam and thelike fluid pressure engines and consists essentially in the arrangementof a valve chamber in the eductionor outlet-pipe, said valve-chambercontaining a disk or other valve, which is operated by means of a pistonworking in a cylinder, which is connected with and disconnected from theboiler by a slide-valve, con trolled by a spring the power of whichcorresponds to a certain pressure of steam, at the excess of which thespring will yield, and allowing steam to flow into the auxiliarycylinder and operate the auxiliary piston, will cause the opening of thevalve.

I will now describe my invention with reiorence to the accompanyingdrawings in which my invention is shown by way of example and in whichFigure 1. shows an elevation of the invention, partly in section. Fig.2. shows a plan of same. Fig. 8. shows sections of same on lines xct andof Fig. 1. Fig. l. shows an end-view of the invention.

A valve-chamber u is inserted into the eduction or outlet pipe (L of asteam engine, which chamber can be closed by two disks, t, t adjacent toeach other, of which disks i is arranged firmly in the casing of thechamber u and t is keyed or otherwise firmly mounted on a spindle iwhich can be rotated. in its bearings. The disks 1." and t are providedwith a number of segmental cut outs or recesses '0 and 12 respectively,which are arranged radially and in distances of more than their ownwidth. The arrangement is such that in the shut position, or position ofrest the recesses of one disk will be covered by the intermediate spacesof the other, and that when the spindle is given a turn the cut outs ofboth disks will coincide and allow the steam coming from the boiler toflow through the openings thus created.

A channel I) is provided so as to form a communication between the partof the eduction or outletipipe a and an oblong Specification of LettersPatent.

Application filed July 20, 1908.

Patented. April 6, 1909.

Serial No. 444,454.

chamber 0 in which a hollow plunger 0 controlled by a spring (1 works. Aduct Z forms a communication between chamber 0 and a cylinder 0 in whicha piston 0 works. Under ordinary circumstances the plunger will be heldby spring (1 against the steam pressure in such a position as to coverduct Z. As soon however as the steam pressure becomes eX- cessive theplunger will be pressed back against the action of the controllingspring and thus uncover duct Z, allowing steam to flowvinto the cylinder0 and to push the piston 0 upward which by means of its rod p and thelever q, pivoted to the latter and keyed or otherwise fastened tospindle t at 2 turns the latter, so that the cut outs of disk t, tcoincide with each other and form openings through which the steamcoming from the boiler is allowed to flow out. The flow of steam willdiminish the pressure in the part of pipe a connecting boiler andvalve-chamber u, so that spring (1 will be able to return plun er 0 toits original position. Duct Z will tien be covered, while a duct 7leading from chamber 0 to cylinder 0 will communicate by means of anannular groove 0 in the plunger with an exhaust port 1, thus allowingthe contents of the cylinder 0 to be exhausted and the piston 0 to drop,the latter causing by its return movement the disk-valve t, t to be shutby means of rods p, q and spindle i The other end of lever q isconnected to a tension spring r arranged on an arm 3, said tension sring assisting in holding spindle i and p unger 0 in the position ofrest. A screw n may be arranged for adjusting the springs 61 fordiil'erent pressures.

m is an open-air port.

Other means such as a counterweight may be arranged instead of spring1*.

Modifications may be made without thereby deviating from the principleof this invention.

What I claim and desire to secure by Letters Patent is z- 1. In a safetyvalve, a valve casing adapted to be connected to a boiler and having anoutlet, an apertured plate in the casing, an apertured disk adapted torotate in contact with the plate, a shaft on which the disk is mounted,a pressure controlled valve, a cylinder having a port controlled by thevalve, a piston actuated by the pressure of fluid for unseating thevalve, means for communicating the motion of the piston to the shaft,and means for exhausting the fluid from the cylinder when the valve isseated.

2. In a safety valve, a valve casing adapted to be placed incommunication with a boiler or the like, said casing having an eX- haustport, an apertured disk stationed in the casing in position to guard theport, an apertured disk rotatable with relation to the stationary disk,a shaft for carrying the rotatable disk, a cylinder having means ofcommunication with the boiler, a valve for controlling the means ofcommunication, means for holding the valve seated to preventcommunication between the cylinder and boiler under normal pressure, thesaid valve being unseated by abnormal pressure in the boiler whereby thefluid in the boiler is permitted to enter the cylinder, .a piston in thecylinder, means for communicating the motion of the piston to the shaft,and means for exhausting the fluid in the cylinder when the valve isseated.

3. In a safety valve, a casing adapted to be placed in communicationwith a boiler or the like, said casing having an exhaust port, anapertured disk stationed in the casing, an apertured disk rotatable withrelation to the stationary disk'whereby the movable disk controls theopening in the stationary disk, a cylinder having a port incommunimotion of the piston to the shaft for carrying the movable disk.

In witness whereof I have hereunto set my hand in presence of twow1tnesses.

HENRI ROUX.

Witnesses ALPHoNsE Ln FAURE, MARIUs MARQUIEV.

